A simulative study on effects of climate warming on nutrient contents and in vitro digestibility of herbage grown in Qinghai-Xizang Plateau

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	A simulative study on effects of climate warming on nutrient contents and in vitro digestibility of herbage grown in Qinghai-Xizang Plateau
	Xu, SX; Zhao, XQ; Sun, P; Zhao, TB; Zhao, W; Xue, B
	2002-11-01
发表期刊	ACTA BOTANICA SINICA
卷号	44 期号:11 页码:1357-1364
文章类型	Article
摘要	The increasing trend of air temperature along with the climate warming has been accepted gradual-ly by scientists and by the general public. Qinghai-Xizang Plateau, a unique geographic unit due to high-altitude climate, is one of the most susceptible regions to climate warming. Its ecosystem is very fragile and sensi-tive to climate change. In order to get a better understanding of the impacts of climate warming on the nutrient contents of herbage grown in Qinghai-Xizang Plateau, a simulative study was implemented at Daban Moutain by using temperature differences resulted from sites selected at different altitudes and nutrient contents and in vitro digestibility were determined for assessing the quality of the grown herbage. There were significant downtrends in crude protein (CP), ether extract (EE) and nitrogen free extract (NFE) contents of herbage along with the increase of temperature. It had a positive correlation between temperature and content of acid detergent fibre (ADF), acid detergent lignin (ADL) in herbage. In vitro digestibility of herbage decreased along with the in-crease of temperature. The results of this study indicated that climate warming significantly influence nutrient contents and in vitro digestibility of herbage grown in Qinghai-Xizang Plateau. It is suggested that the future climate warming especially the gradual rise of the night temperature could cause negative effect on herbage quality grown in Qinghai-Xizang Plateau by decreasing CP, EE, and NFE contents and increasing some indi-gestible ingredients such as crude fibre (CF), neutral detergent fibre (NDF), ADF, and ADL. This, conse-quently, decreases the ruminant assimilation ability.; The increasing trend of air temperature along with the climate warming has been accepted gradually by scientists and by the general public. Qinghai-Xizang Plateau, a unique geographic unit due to high-altitude climate, is one of the most susceptible regions to climate warming. Its ecosystem is very fragile and sensitive to climate change. In order to get a better understanding of the impacts of climate warming on the nutrient contents of herbage grown in Qinghai-Xizang Plateau, a simulative study was implemented at Daban Moutain by using temperature differences resulted from sites selected at different altitudes and nutrient contents and in vitro digestibility were determined for assessing the quality of the grown herbage. There were significant downtrends in crude protein (CP), ether extract (EE) and nitrogen free extract (NFE) contents of herbage along with the increase of temperature. It had a positive correlation between temperature and content of acid detergent fibre (ADF), acid detergent lignin (ADL) in herbage. In vitro digestibility of herbage decreased along with the increase of temperature. The results of this study indicated that climate warming significantly influence nutrient contents and in vitro digestibility of herbage grown in Qinghai-Xizang Plateau. It is suggested that the future climate warming especially the gradual rise of the night temperature could cause negative effect on herbage quality grown in Qinghai-Xizang Plateau by decreasing CP, EE, and NFE contents and increasing some indigestible ingredients such as crude fibre (CF), neutral detergent fibre (NDF), ADF, and ADL. This, consequently, decreases the ruminant assimilation ability.
关键词	Climate Warming Daban Mountain Temperature Herbage Nutrient Contents In Vitro Digestibility
WOS标题词	Science & Technology ; Life Sciences & Biomedicine
学科领域	植物学
收录类别	SCI
语种	英语
WOS研究方向	Biochemistry & Molecular Biology ; Plant Sciences
WOS类目	Biochemistry & Molecular Biology ; Plant Sciences
WOS记录号	WOS:000179410400016
引用统计	被引频次：7[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://210.75.249.4/handle/363003/683
专题	中国科学院西北高原生物研究所
作者单位	Chinese Acad Sci, NW Plateau Inst Biol, Xining 810001, Peoples R China
推荐引用方式 GB/T 7714	Xu, SX,Zhao, XQ,Sun, P,et al. A simulative study on effects of climate warming on nutrient contents and in vitro digestibility of herbage grown in Qinghai-Xizang Plateau[J]. ACTA BOTANICA SINICA,2002,44(11):1357-1364.
APA	Xu, SX,Zhao, XQ,Sun, P,Zhao, TB,Zhao, W,&Xue, B.(2002).A simulative study on effects of climate warming on nutrient contents and in vitro digestibility of herbage grown in Qinghai-Xizang Plateau.ACTA BOTANICA SINICA,44(11),1357-1364.
MLA	Xu, SX,et al."A simulative study on effects of climate warming on nutrient contents and in vitro digestibility of herbage grown in Qinghai-Xizang Plateau".ACTA BOTANICA SINICA 44.11(2002):1357-1364.

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